<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            background-color: #333;
        }
        .map {
            position: relative;
            width: 747px;
            height: 617px;
            background: url(media/map.png) no-repeat;
            margin: 0 auto;
        }
        .city {
            position: absolute;
            top: 227px;
            right: 193px;

        }
        .taibei {
            position: absolute;
            top: 500px;
            right: 80px;

        }
        .guangzhou {
            position: absolute;
            top: 542px;
            right: 200px;

        }
        .dotted {
            width: 8px;
            height: 8px;
            background-color: #09f;
            border-radius: 50%;
        }
        .city div[class^='pulse'] {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);
            width: 8px;
            height: 8px;
            box-shadow: 0 0 12px #009dfd;
            border-radius: 50%;
            animation: pulse 1.2s linear infinite;
            
        }
        .city div.pulse2 {
            animation-delay: 0.4s;
        }
        .pulse3  {
            animation-delay: 0.8s !important;
        }  
        @keyframes pulse {
            0% {

            }
            70% {
                width: 40px;
                height: 40px;
                opacity: 1;
            }
            100% {
                width: 70px;
                height: 70px;
                opacity: 0;
            }
        }
    </style>
</head>
<body>
    <div class="map">
        <div class="city">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
        <div class="city taibei">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
        <div class="city guangzhou">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
    </div>
</body>
</html>